Houston-based Easton Energy LLC is expanding its midstream assets in South Texas, agreeing to buy a petrochemical pipeline system from ExxonMobil for an undisclosed amount.

Easton Energy

The South Texas Pipeline System runs 720 miles from ExxonMobil’s Clear Lake and Katy gas plants near Houston to Energy Transfer LP’s King Ranch gas plant and the Port of Corpus Christi. The line historically has been used to transport oil and natural gas liquids (NGL), but most recently has shipped refinery grade propylene.

The system would connect to Easton’s 50 million bbl salt dome storage facility in Markham, which is between the petrochemical markets in Houston and Corpus Christi along the coast. With the acquisition, Easton’s interconnected system would span Corpus Christi, Houston, Mont...